Excerpt from an interview with Michael Bierut on the Obama campaign’s visual brand:

The
thing that sort of flabbergasts me as a professional graphic designer
is that, somewhere along the way, they decided that all their graphics
would basically be done in the same typeface, which is this typeface
called Gotham If you look at one of his rallies, every single non-handmade sign is in
that font. Every single one of them. And they’re all perfectly spaced
and perfectly arranged. Trust me. I’ve done graphics for events –and I
know what it takes to have rally after rally without someone saying,
"Oh, we ran out of signs, let’s do a batch in Arial." It just doesn’t
seem to happen. There’s an absolute level of control that I have
trouble achieving with my corporate clients.